How do you wear a filter mask?

Wearing a filter mask correctly involves ensuring a proper fit and seal to protect you from harmful particles or gases. Based on the provided video information regarding half-face respirators, here's a general guide:

Inspect the Mask: Before each use, check the respirator for any damage, holes, or wear and tear. Make sure all components are properly assembled.
Position the Straps: Place the bottom strap around the back of your neck, positioning it below your ears. This will help secure the mask.

While the video excerpt only contains those two steps, properly wearing any filter mask generally involves these additional steps as well:

Position the Mask: Center the mask over your nose and mouth. Ensure it covers your face adequately.
Adjust the Straps: Adjust the top straps (if applicable) so the mask feels snug but not overly tight. The goal is to achieve a good seal against your face without causing discomfort. If your mask only uses one strap, ensure it's tight enough to create a seal.
Perform a Seal Check: This is crucial. There are two types:
- Positive Pressure Check: Cover the exhalation valve (if present) and gently exhale. You should feel slight pressure inside the mask, and no air should leak around the edges.
- Negative Pressure Check: Cover the filter(s) and gently inhale. The mask should collapse slightly against your face, and no air should leak around the edges.
Readjust if Needed: If you detect any leaks during the seal check, readjust the straps and repeat the check until a proper seal is achieved. Facial hair can interfere with the seal, so a clean-shaven face is usually recommended.
Replace Filters Regularly: Filters have a limited lifespan. Follow the manufacturer's recommendations for filter replacement based on usage and the type of contaminants you're exposed to.

Remember that different types of filter masks (e.g., N95, half-face respirators, full-face respirators) might have slightly different procedures for proper fitting and usage. Always consult the manufacturer's instructions for your specific mask model.